Improvement in wood-pulp machines



UnTTn TTEs JAMES TAYLOR, OF LUZERNE, NEW YORK.

IMPROVEMENT IN WOOD-PULP MACHINES.

Specification forming part of Letters Patent No. 117,122, dated J nly18, 1871.

To all lwhom t may concern:

Be it known that I, JAA/nis TAYLOR, of Luzerne, in the county of Warrenand State of New York, have invented a new and Improved Wood- PulpMachine; and I do hereby declare that the following is a full, clear,and exact description thereof, which will enable others skilled in theart to make and use the same, reference being had to the accompanyingdrawing forming part of this specification, in which- Figure 1represents a vertical longitudinal seetion of my improved wood-pulpmachine taken on the plane of the line x, Fig. 2. Fig. 2 is a horizontalsection of the same taken on the line y y, Fig. 1.

Similar letters of reference indicate corresponding parts.

This invention relates to several improvements in wood-pulp machines,and more particularlyto a new means for preparing and mode of supplyingthe wood to the grinding apparatus. My invention consists in improvingwood-pulp machines, as hereinafter fully described and subsequentlypointed out in the claims.

A in the drawing represents the upright shaft of the grinding-mill. Uponit is mounted the grinding-core B, made of metal or stone of invertedconical or other suitable shape. O is the stationaryT grinding-shellsurrounding the core and supported on a suitable stationaryT frame. Theshell is also made of stone or metal, and has its inner face toothed orroughened to conform to the equally-toothed or roughened grinding faceof the core. The teeth are larger and coarser at I the upper end of thecore and shell, and become gradually smaller toward the lower end of thesame. The wood to be ground is fed to the top of the mill, and is -iirstcrushed by the coarse teeth, and finally ground down to the requisitedegree of flneness. Itis as pulp discharged from the lower part of theshell through an opening, a, in the same, the lower part of core orshell being grooved, as at b, to facilitate the discharge of the pulp.The shell is made in halves, of semiconical or semi-cylindrical form.Pieces c o of rubber or other elastic material are interposed betweenthe edges of the halves. Suitable clamps, bands, or screws hold thelatter together. When the grinding-surfaces are worn the halves of theshell can be brought nearer together by reducing the thickness ofmaterial at c. The mill can, by making the shell in sections, be easilytaken apart for re-sharpening the grinding-faces. D is a water-tank,sustained near the upper end of the shell O on a suitable frame-work. Anendless band, E, carrying buckets cl d, and laid around rollers e andj', of which the former is within the latter above the tank, constitutesan elevator for feeding the wood to the mill.

The wood is in pieces of suitable size thrown into the tank and fed bythe elevator, together with the requisite amount of water, to the mill,where it is ground to pulp. This arrangement of tank and elevator isvery important, as it does the wet part of the work automatically, anddoes not wet and injure the attendants, which is the chief objection tomost other pulp-mills now in use.

Near the tank D is arranged a gang of saws, F F, to cut large blocks ofwoods into small pieces, which are, together with the sawdust, fed tothe tank by a spout, G. The wood is thus easily prepared for a millofthe described kind, and neednot be applied to the grinders in largeblocks, as hitherto. The sawdust being fed to the tank is brought to themill with the water and not lost.

Motion is applied to the saws and elevator, as well as to the grinders,by suitable machinery.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The saws F F, combined with and made part of awood-pulp machine, substantially as and for the purpose herein shown anddescribed.

2. The grinding-shell O, made in two pieces and provided with theelastic strips c between the edges, substantially as and for the purposeherein shown and described.

JAMES TAYLOR.

Witnesses:

G. F. ROIDER, M. E. SAvoY.

